#include <stdio.h>

int main() {
   int a[3][3] = {{2,5,2},{6,-7,2},{1,2,1}};
   int b[3][3] = {{-4,2,2},{5,5,2},{4,2,-3}};
   int s[3][3] = {{0,0,0},{0,0,0},{0,0,0}};
   int p[3][3] = {{0,0,0},{0,0,0},{0,0,0}};

   int r, c, i;

   for (r = 0; r < 3; r++)
      for (c = 0; c < 3; c++)
         s[r][c] = a[r][c] + b[r][c];

   for (r = 0; r < 3; r++) 
      for (c = 0; c < 3; c++)
         for (i = 0; i < 3; i++) 
            p[r][c] = p[r][c] + a[r][i] * b[i][c];
 
   printf ("\n");
   for (r = 0; r < 3; r++){
      for (c = 0; c < 3; c++)
          printf("%5d", s[r][c]);
      printf("\n");
   }

   printf ("\n");
   for (r = 0; r < 3; r++){
      for (c = 0; c < 3; c++)
          printf("%5d", p[r][c]);
      printf("\n");
   }

   return 0;
}